buchholz



that the following is a full, clear, and exact reference being had to the accompan yin gdrawinto semolina.

- well-known or apparent means.

.ripping-mill-that is to say, after the semosemolina or into flour; or I. takev the whole after described, instead of subjecting the and are speeded so that one roller will rotate,

,/"UNITED STATES;-

PA-'rENT OFFICE. A

eUsTAv ApBUoHHoLZ, or .snnrnnnnsnusa ENGLAND.

IMPRQVBMENT 1N MANUFACTURE or' AND MEANS sEMoLINA AND-moua.

Specijicaiion jor-ming part of Letters Patent No. 97,037,vdated November 23,

'. England March 28, i867.

To all whom 'it may concern v:

Be it known that I, G. A. BUoHHoLz, of Shepherds Bush, county of Middlesex, England, have 'invented a new and luseful Improvement in the Manufacture of and Means of Assorting Semolina, and in the reduction of the same to Hour; and I do hereby declare description thereof, which will enable others skilled in 'the art to make and use the same,

ings, forming part of this specification'.

In the applieatioirior patent beat-ingeven date herewith, and marked Gase I, I have described an arrangement of mill for ripping the hulled grain for theconversion of the same By the use oi' this mill alarge percentage ofthe ripped grain was left unconverted, and required subsequenttreatment to manufacture it into semolina or into iiour, which operations had to be effected by any I now propose, u nder the presen t application, to take up the manufacture of semolina and flour at the point that the mate-rial left the lina produced by the action of the rippingmillon the hulled grain has been sifted out, I act upon the residue in the manner' to be presently described, in order to convert it into of the product from the ri pping-mill, and convert the same into iiour by means of rollers constructed and operated in the manner hereripped grain to millstones or equivalent grinding machinery.

'Io attain these results I use pairs of groovcd rollers, which are nicely adjusted to their work,

say, from four to six times as fast the other roller, and thereby reduce by acutting in contradistinction to a crushing action the ripped corn into particles of th required size. rIhe rollers are mounted after t e manner described in the specification ot'rmy above-mentioned ap plication, and are fed with the ripped grain y, from a hopper. The passing of the rippedg grain between the rollers will convert the i' OF ASSORTING- 1869; puzcnted a The arrangement of mill which I employ is y shown in vertical sectional; Fig. l, Sheet I. rlhe kind oi grooved rolld'r which I prefer to employ for converting the grain into semolina is shown in plan view at Fig. 2, and in partial end elevation at Fig. 3; butI do not confine myself to the use ot"cutti1igrollers having` :the sectional form ot' ribs or `grooves shown at Fig. 3, as thatmay be greatly varied without materially affecting the action ot' the roll'-v ers. The grooving (see Fig. 2) takes a helical direction in one roller to the left, and in the other to the right hand, in cach case the twist v being at about an angle ot' forty-live degrees to the axis ot' the roller.

Instead of this helical arrangement ot' thel grooves, I can make very'good work with straight-grooved rollers, similarto that shown at Fig. 4; but I have found that a better result is obtained by lengthening the time oli' con tact between the grains andthe actin g surtace oi' the separating-rollers, and 'this l. ci'i'ect by cutting the grooves in helical lines around the peri pheries ot' the'rollers, as already expwined. The material, as it leaves the rollers, r. il con sist of semolina of different qualities, oi' frag This machine Vmay be described as follows:

'A hopper (not shown in the drawing) is pro.

videdfor receiving thematerial to be assorted. The pendent discharge-tube A of this hopper is fitted at bottom with a valve, l,(sec the de- .tach ed views, Figs. 3 and AL, Sheets .LII and IV,)

which represent on an enlarged scale, in sectional elevation and plan view, what I term the spreaden?7 to be more particularly described hereafter. rIhe valve B is capable of vertical adjustment by means of a balanced rock-lever,

"C, to regulate the dow of the material from the hopper into the assorting-machine. The

- seniolina, with the bran, falls' from this hopper'into the spreader before mentioned, whichv consists'of a rotating shallow cup, in the llip of which are set inclined radial blades, to assist Ain the discharge of the material horiaontally by centrifn gal action, in order that it may fall nearer to or farther from the axis of rotation of the spreader, according to the speciic gravity of the individual particles. D is the cup, formed of wood, fitted to a ,flanged boss, D', keyed to a vertical spindle, E. In the lip of the cup D vertical grooves are cut radially,

' and at equal distances apart, to receive the p VJthe casing H. The shaft may be driven by gearing in the ordinary Way.- Below the casing, and connected by means of openings in the bottom with the interior, is a set of three, 4or it may be less or more, concentric funnels, I 1112, which are intended, respectively, to receive the assorted substances and deliver them to proper receptacles. By the rotation of the spreader, into whichy the semolina to be assorted is delivered, a centrifugal motiomwill be imparted to 'the semolina, and the heavy grains discharged into the casin g will fall near its periphery and find their Way into theo ter funnel l2. The lighter semolina will fall Wir'm the circle of the heavier particles, and will be, discharged into the second funnel, Il, and the bran mixed with the semolina will fall nearer the center of motion, and escape through the central funnel I. 'Io facilitate the operation of this apparatus, l propose to admit air freely to the cylindrical case, and to maintain a partial exhaustion in the funnels by means of an exhaust-fan, K, which I connect thereto, as

shown at Fig. 1. The semolina thus assorted l I propose 1n some cases to reduce to Hour, using lthe heavy or best semolin-a for the best flour, i

and the lighter for an inferior quality. In other cases I collect the heavy semolinaand store it for sale.

In manufacturing semolina by cutting-rekters, as above described, I found that the size of the semolina produced depended upon the size of the grooves of the. cutting-rollers. Judging from this fact, that it was possible to reduce the 'grain to flour by modifying thev apparatus, I have been en abled by experimen t to demonstrate the accuracyof this conclusion, and I therefore, instead of submitting the se'nolina to stones for the purpose of reducing it to flour, run it through one or'more pai-rs oi steel rollers, having fine straight or helical grooves on their periphery, preferring the forni of ribs and grooves shown at Fig. 5, Sheetv carrying the same into effect, l wish it to be understood thatI claim-'- l. The converging funnels I I1 I?, arranged around therotating shaft B, to' receive, con- Vey, and discharge into separate receptacles v the dierent sizes of ripped grain, in the manner described.

2. The said fuunels I. l I2, in combination with a centrifugal spreader, conical valve, and

. delivery-tube, all arranged Land operating together in the manner set' forth.

3. A centrifugal spreader, D, provided with al series of steel blades, F, arranged around its beveled inner surface, as shown and described. f

The above specification signed by me this 12th day of July, 1869.

G. A. BUCHHOLZ.

Witnesses:

FRED. WALKDEN,

66 Chancery Lane, London. DAN FoRsHAW,

24 Royal Exchange, London. 

